I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
puli pul pula pull pili pule plie polio pilei pulley pallia pal pol ply plew plow pale pial pole poly pily paly poll ploy plea pill play polo peal pail pele pool pall pile pawl peel palea pally pilau pilaw pilea poilu